Home – Home – Jornals – Atmospheric and Oceanic Optics 2024 number 3

This work presents the analysis of the spatial distribution of number concentrations, size distribution, and chemical composition of aerosol particles measured for the first time over the seas of the Russian Arctic. Various types of vertical distribution of the number concentration were recorded, characteristic of both coastal marine and continental areas. Most of them turned out to be of the continental type. Attention is also drawn to the almost complete absence of coarse particles above 2-3 km over all seas. The chemical composition of the Arctic aerosol at altitudes of 200 m 5000 m contains ions that can be attributed to both marine and continental. The identifiable non-carbon elemental part of the aerosol (without ions) over the Arctic is 3-4 times larger than the at for ions. Over all seas and at both altitudes, the Arctic aerosols mainly contain elements of terrigenous origin - Al, Cu, Fe, Si. Over almost all seas, except the Barents Sea, Si dominates in the elemental composition of the aerosol, its contribution over the Chukchi Sea reaching 85%. The analysis of backward trajectories showed that in all cases considered, whether the aerosol was formed over the continent or sea, air trajectories passed both over sea and over land. In this case, the formed particles could be enriched with additional ions and elements along the way.